Select the best response to the question.
?Which of the following is a clinical indication for the use of a broad spectrum antibiotic?
A) The pathogen is virulent.
B) The pathogen has not yet been identified.
C) The pathogen is anaerobic.
D) The host is immunocompromised.
B
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Compared with the interstitial fluid that bathes active muscle cells, blood reaching these muscle cells in arteries has a _____
A) higher B) higher C) greater bicarbonate concentration D) lower pH E) lower osmotic pressure
Gram-positive bacteria such as Propionibacterium acnes limit the growth of gram-negative bacteria and some fungi on the human skin by converting secreted ________ to compounds with antimicrobial activity.
A. urea B. lipids C. organic acids D. salts
The accompanying figure illustrates the process of human development from fertilization to implantation. Describe what happens from day 1 through days 6-7 of this process
Which of the following is not found in the cytoskeleton?
A. intermediate filaments B. spindle fibers C. actin filaments D. microfilaments E. none of the above